Operations with fractions Please help !!!!! questions attached

Answer:
1) 23/20
2) 14/5
3) 47/14
4)27/56
5) 10/7
6) 23/14
Step-by-step explanation:
We will apply the Least Common Multiple (LCM). because, each exercise has fractions without a common a denominator
[tex]\frac{3}{4} +\frac{2}{5} = \frac{15+8}{20} =\frac{23}{20}\\\\1 +\frac{9}{5} = \frac{5+9}{5} =\frac{14}{5}\\\\\frac{13}{7} +\frac{3}{2} = \frac{26+21}{14} =\frac{47}{14}\\\\\frac{5}{8} -\frac{1}{7} = \frac{35-8}{56} =\frac{27}{56}\\\\1 +\frac{3}{7} = \frac{7+3}{7} =\frac{10}{7}\\\\\frac{1}{7} +\frac{3}{2} = \frac{2+21}{14} =\frac{23}{14}[/tex]